In 1943, during World War II, Norwegian commandos launched a raid to sabotage a German-operated heavy water plant in Norway. The U.S. government began circulating one-cent coins made of steel plated with zinc (the steel pennies proved very unpopular, since they were easily mistaken for dimes).

In 1951, the 22nd Amendment to the Constitution, limiting a president to two terms of office, was ratified.

In 1960, the U.S. Olympic hockey team defeated the Soviets, 3-2, at the Winter Games in Squaw Valley, Calif. (The U.S. team went on to win the gold medal.)

In 1968, at the conclusion of a CBS News special report on the Vietnam War, Walter Cronkite delivered a commentary in which he said the conflict appeared "mired in stalemate."

In 1973, members of the American Indian Movement occupied the hamlet of Wounded Knee in South Dakota, the site of the 1890 massacre of Sioux men, women and children. (The occupation lasted until May.)

In 1982, Wayne Williams was found guilty of murdering two of the 28 young blacks whose bodies were found in the Atlanta area over a 22-month period. (Williams, who was also blamed for 22 other deaths, has maintained his innocence.)

In 1991, during Operation Desert Storm, President George H.W. Bush declared that "Kuwait is liberated, Iraq's army is defeated," and announced that the allies would suspend combat operations at midnight, Eastern time.

Ten years ago: The Bush administration lowered the national terror alert from orange to yellow. Iraq agreed in principle to destroy its Al Samoud II missiles, two days before a U.N. deadline. Former Bosnian Serb leader Biljana Plavsic was sentenced by the U.N. tribunal in The Hague, Netherlands, to eleven years in prison for war crimes. (She was released in 2009.) Children's television host Fred Rogers died in Pittsburgh at age 74.

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Five years ago: William F. Buckley Jr., the author and conservative commentator, was found dead at his home in Stamford, Conn.; he was 82. Civil rights leader John Lewis dropped his support for Democratic presidential candidate Hillary Rodham Clinton in favor of Barack Obama. A judge in Canton, Ohio, sentenced former police officer Bobby Cutts Jr. to life in prison with a chance of parole after 57 years for killing his pregnant lover, Jessie Davis, and their unborn child.

One year ago: President Barack Obama urged the nation's governors at the White House to invest more state resources in education, saying a highly skilled workforce was crucial for the U.S. to remain competitive with other countries. Three students were shot to death in a Chardon, Ohio, high school cafeteria, allegedly by a 17-year-old who was charged with aggravated murder. Matt Kenseth won his second Daytona 500, holding off Dale Earnhardt Jr. a day after rain had postponed the race for the first time in its 54-year history from Sunday to Monday.